CN103318979B - Circulating cooling water biological slime control agent and its application method - Google Patents
Circulating cooling water biological slime control agent and its application method Download PDFInfo
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- CN103318979B CN103318979B CN201210076449.7A CN201210076449A CN103318979B CN 103318979 B CN103318979 B CN 103318979B CN 201210076449 A CN201210076449 A CN 201210076449A CN 103318979 B CN103318979 B CN 103318979B
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Abstract
The invention discloses a circulating cooling water biological slime control agent and its application method. Specifically, the biological slime control agent contains a bactericide, a biosurfactant and a penetrating agent. The biological slime control agent provided in the invention can realize effective biological slime control on equipment and pipelines of a circulating cooling water system, and can reduce the bactericide dose at the same time of improving the slime control effect of the circulating cooling water system. In the invention, the biodegradable and environmental friendly biosurfactant is employed to replace a chemically synthesized surfactant perform slime stripping, thus reducing the drain water environmental pollution caused by adding of a chemically synthesized agent into circulating water.
Description
Technical field
The present invention relates to a kind of biological clay control agent and application method thereof, particularly, relate to a kind of be suitable for recirculated cooling water can foundry loam effectively in controlled circulation cooling water system and microorganism and the biological clay control agent of environmental protection and the application method in the foundry loam of controlled circulation water coolant thereof.
Background technology
In the process of industrial colling, often run into corrosion and scaling, foundry loam problem.Along with the raising of water technology, the corrosion-mitigation scale-inhibition problem of most of water coolant obtains good solution, but the foundry loam of system and bacterium algae problem more outstanding, especially when material from leakage, foundry loam often controls bad.Microorganism viscosity mud is once be formed in a large number, not only can reduce the cooling effect of interchanger and cooling tower, worsen water quality, but also the corrosion of equipment in cooling water system can be caused, reduce inhibition, the scale inhibition of water quality stabilizer and the effect of killing livestock, direct impact also endangers production, brings financial loss.In many factories cooling water system, foundry loam becomes one of subject matter.
Solving one of effective means of biological clay is use adhesive mud remover.Domestic cycle water adhesive mud remover mostly is cationic surfactant, use peeling effect is pretty good, but also there are some defects, comprise in use procedure and produce a large amount of foam and detrimentally affect is produced to other water conditioner, simultaneously, also there is use cost and greatly, and easily secondary pollution problems is caused to environment compared with high, consumption.
CN1853473A proposes a kind of Biocidal algae-killing agent that can carry out effectively peeling off for microorganism viscosity mud, and it contains isothiazolinone, dodecyl dimethyl benzyl ammonium chloride, polyacrylic acid.This Biocidal algae-killing agent is chemosynthesis medicament, and generally uses with higher dosage.
CN101849547A discloses a kind of efficient germicide, it is the aqua product containing isothiazolinone, trishydroxymethylnitromethane and dibromoethyl alcohol three kinds of main ingredients, there is when low dosage good microorganism killing and sludge stripping effect, can in industrial circulating water and Membrane cleaning two different field application.Its shortcoming is that trishydroxymethylnitromethane can slowly decompose in micro alkaline solution and releases formaldehyde, and work-ing life shortens, so be not too applicable in subalkaline recirculated water.
Existing adhesive mud remover is in order to remove foundry loam in recirculating cooling water system and microorganism, need to use heavy dose of sterilant, but also serious pollution is caused to environment, along with the enhancing of mankind's environmental consciousness, eager need to develop a kind of can foundry loam effectively in controlled circulation cooling water system and microorganism and the foundry loam control agent of environment-friendly type.
Summary of the invention
The object of the invention is to solve the above-mentioned problems in the prior art, there is provided a kind of can foundry loam effectively in controlled circulation cooling water system and microorganism, reduce sterilant consumption, biodegradable, environmentally friendly biological clay control agent and application method thereof.
For achieving the above object, the invention provides a kind of biological slime of circulating cooling water control agent, wherein, described biological clay control agent contains sterilant, bio-surfactant and permeate agent.
In addition, the present invention also provides a kind of method utilizing foundry loam in biological slime of circulating cooling water control agent controlled circulation cooling water system of the present invention, and the method comprises to be put into described biological slime of circulating cooling water control agent in recirculated cooling water.
Adopt biological clay control agent of the present invention can carry out effective biological clay control to the e-quipment and pipe of recirculating cooling water system.Its advantage is to adopt biological clay control agent of the present invention can reduce the consumption of sterilant while improving recirculating cooling water system foundry loam control effects, use biodegradable, environmentally friendly bio-surfactant to substitute synthetic surfactant and carry out sludge stripping, thus minimizing recirculated water adds the draining environmental pollution that chemosynthesis medicament brings.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
According to biological slime of circulating cooling water control agent of the present invention, wherein, described biological clay control agent contains sterilant, bio-surfactant and permeate agent.
According to biological slime of circulating cooling water control agent of the present invention, the selectable range of the consumption of described sterilant, bio-surfactant and permeate agent is wider, under preferable case, with the gross weight of described biological clay control agent for benchmark, the content of described sterilant is 30-50 % by weight; The content of described bio-surfactant is 30-50 % by weight; The content of described permeate agent is 10-30 % by weight.
According to biological slime of circulating cooling water control agent of the present invention, when described bio-surfactant refers to that microorganism is cultivated under certain condition, the oozy meta-bolites with certain surface activity in its metabolic process, it comprises many different kinds.Chemical constitution according to them can be divided into the five large classes such as glycolipid, lipopeptid and lipoprotein, lipid acid and phosphatide, polymkeric substance and full cellular surface lipid.Bio-surfactant in the present invention mainly plays a part to peel off, disperse biological clay, also has hydrotropy simultaneously, sterilant can be made to be dissolved in the water better.Because glycolipid bio-surfactant has good perviousness, dispersiveness and bacteriostasis property, therefore, the present invention preferably uses glycolipid bio-surfactant.The specific examples of described glycolipid bio-surfactant has: rhamnolipid, marine alga glycolipid, sophorolipid, mannosylerythritol lipid, cellobiose fat, that is, can be selected from one or more in above-mentioned bio-surfactant.More preferably, be selected from rhamnolipid, marine alga glycolipid, sophorolipid and mannosylerythritol lipid one or more.It should be noted that, above-mentioned bio-surfactant can add with the form of its pure substance, and also can add with the form of its aqueous solution, the present invention is not particularly limited its type of service.
According to biological slime of circulating cooling water control agent of the present invention, described sterilant can be the various non-oxidative bactericides that this area routine uses, and mainly plays germicidal action, and some sterilant also has certain sludge stripping effect.The specific examples of described non-oxidative bactericide has: 2,2-bis-bromo-3-nitrilo propionic acid amide (DBNPA), glutaraldehyde, dithiocyano-methane, Dichlorophenol, trichlorophenol, sodium pentachlorophenate etc., that is, can be selected from above-mentioned non-oxidative bactericide one or more.More preferably, described non-oxidative bactericide is selected from one or more in DBNPA (DBNPA), glutaraldehyde and dithiocyano-methane.It should be noted that, above-mentioned sterilant can add with the form of its pure substance, and also can add with the form of its aqueous solution, the present invention is not particularly limited its type of service.
According to biological slime of circulating cooling water control agent of the present invention, consider and the interaction of bio-surfactant and osmotic effect, permeate agent of the present invention is preferably the permeate agent of not cation.Permeate agent can improve sterilization and the sludge stripping effect of medicament simultaneously, gives full play to the synergistic effect between medicament.The specific examples of described permeate agent of the present invention has: sodium diethylhexyl sulfosuccinate, fatty alcohol-polyoxyethylene ether, water-solubleazone, sulfated castor oil, sodium alkyl sulfate, sodium alkyl benzene sulfonate, alkyl sulfuric ester sodium etc., that is, can be selected from above-mentioned permeate agent one or more; More preferably, described permeate agent be selected from sodium diethylhexyl sulfosuccinate, fatty alcohol-polyoxyethylene ether and water-solubleazone one or more, described fatty alcohol-polyoxyethylene ether preferably has general formula R O (CH
2cH
2o)
nthe compound of H, wherein, R is C
8-C
10alkyl, n is the integer of 4-6.It should be noted that, above-mentioned permeate agent can add with the form of its pure substance, and also can add with the form of its aqueous solution, the present invention is not particularly limited its type of service.
Present invention also offers a kind of method utilizing foundry loam in biological slime of circulating cooling water control agent controlled circulation cooling water system of the present invention, the method comprises to be put into described biological slime of circulating cooling water control agent in recirculated cooling water.
According to method of the present invention, described biological slime of circulating cooling water control agent can directly be put in recirculated cooling water; But, in order to make the dispersion of described biological clay control agent evenly (sterilant be usually commercially available, bio-surfactant and permeate agent commodity major part use with the form of the respective aqueous solution, its concentration is in aqueous higher), described biological clay control agent and water can also be mixed after each component is mixed and put into again in recirculated cooling water, like this, described biological clay control agent can be made to be distributed to equably rapidly in described recirculated cooling water.Wherein, the consumption of described water can adjust according to actual needs, is not particularly limited.In addition, the present invention has no particular limits for described water, can be various forms of water conventional in this area, such as: tap water, pure water, distilled water, deionized water etc., consider and wish to avoid the issuable impact of composition in biological clay control agent described in ion pair contained in described water, in the present invention, preferably use deionized water.
Biological slime of circulating cooling water control agent provided by the invention can be applied in various circulating water cooling system, and under preferable case, it is 7-9 that biological clay control agent of the present invention is specially adapted to pH value; Being preferably pH value is in the weakly alkaline recirculating cooling water system of 7.5-8.5, for carrying out effective biological clay control to the e-quipment and pipe of recirculating cooling water system.Under preferable case, the consumption of described biological clay control agent makes, and with the recirculated cooling water of often liter for benchmark, the content of described biological clay control agent is 10-20mg.
To be described in further detail the present invention by specific embodiment below.
The all ingredients used in the embodiment of the present invention is as shown in table 1 below:
Table 1
Embodiment 1-10 and comparative example 1-5
Under normal temperature (25 DEG C), the blending ratio of the formula of according to the form below 2 gets each component, is uniformly mixed.
Table 2
The sterilant be purchased in above-mentioned table 1, tensio-active agent and permeate agent major part use with the form of its aqueous solution.Those skilled in the art are the content requirement that how many times can meet each component in biological clay control agent in above-mentioned table 2 by calculating the amount can learning the sterilant used as an aqueous solution, tensio-active agent and the permeate agent be purchased separately.
Application examples 1 laboratory test
Should use-case for illustration of the sludge stripping effect of the biological clay control agent of embodiment 1-10 and the adhesive mud remover of comparative example 1-5.
The laboratory evaluation method of sludge stripping performance adopts Extracellular polymers method.Extracellular polymers is the important component part of active sludge, and its main organic composition is carbohydrate, nucleic acid and protein.After foundry loam control agent acts on active sludge, the organic composition such as polysaccharide and nucleic acid is scattered in water, and the sludge stripping effect of content to foundry loam control agent according to the organic composition such as polysaccharide and nucleic acid in water is evaluated.Concrete operation step is as follows:
(1) active sludge fetched by Fangshan secondary sedimentation tank of sewage treatment work is placed in the centrifugal 5min of 7000r/min on whizzer, abandoning supernatant, by distilled water eccentric cleaning 3 times repeatedly, obtains foundry loam for subsequent use.
(2) in Erlenmeyer flask, add the above-mentioned foundry loam that step (1) obtains, and with distilled water diluting to 10g/L, and the adhesive mud remover added respectively in the foundry loam control agent and comparative example 1-5 that embodiment 1-10 prepares, be placed in shaking flask cabinet, under 27 DEG C of constant temperature, with the rotating speed of 150r/min, rock 24h, obtain mixed solution.
(3) take out above-mentioned mixed solution to filter, measure the content of polysaccharide and nucleic acid in filtrate.Measurement of the polysaccharide content adopts anthrone-sulphuric acid method, and the mensuration of nucleic acid content adopts fixing phosphorus method.The results are shown in following table 3.
Table 3
| Numbering | Polysaccharide content/(mg/L) | Nucleic acid content/(mg/L) |
| Embodiment 1 | 21.5 | 3.96 |
| Embodiment 2 | 20.3 | 3.82 |
| Embodiment 3 | 20.6 | 3.88 |
| Embodiment 4 | 20.5 | 3.79 |
| Embodiment 5 | 19.7 | 3.66 |
| Embodiment 6 | 19.8 | 3.74 |
| Embodiment 7 | 20.1 | 3.85 |
| Embodiment 8 | 21.4 | 4.02 |
| Embodiment 9 | 19.8 | 3.93 |
| Embodiment 10 | 19.9 | 3.97 |
| Comparative example 1 | 6.5 | 1.05 |
| Comparative example 2 | 7.4 | 1.07 |
| Comparative example 3 | 6.8 | 1.02 |
| Comparative example 4 | 5.3 | 1.01 |
| Comparative example 5 | 11.2 | 2.47 |
As can be seen from the result of table 3, polysaccharide in the filtrate utilizing the biological clay control agent of embodiment 1-10 to obtain and the content of nucleic acid are all higher than the content of the polysaccharide in the filtrate utilizing the adhesive mud remover of comparative example 1-5 to obtain and nucleic acid, illustrate that biological clay control agent (embodiment 1-10) of the present invention is compared with the adhesive mud remover (comparative example 1-5) of prior art, effectively can break up zoogloea, and the polysaccharide in zoogloea and nucleic acid component are dissociated out, therefore there is more excellent sludge stripping effect.
Application examples 2 laboratory test
Should use-case for illustration of the sterilization effect of the biological clay control agent of embodiment 1-10 and the adhesive mud remover of comparative example 1-5.
The active sludge taking the equal in quality fetched from Fangshan secondary sedimentation tank of sewage treatment work joins a series of 250mL Erlenmeyer flask, add the biological clay control agent of embodiment 1-10 and the adhesive mud remover of comparative example 1-5 more respectively, be placed in shaking flask cabinet and rock 24h under 27 DEG C of constant temperature, with the rotating speed of 150r/min, measure heterotrophic bacterium number in water.The results are shown in following table 4.
Table 4
| Numbering | Heterotrophic bacterium number/(individual/mL) |
| Embodiment 1 | 1.8×10 4 |
| Embodiment 2 | 2.6×10 4 |
| Embodiment 3 | 3.1×10 4 |
| Embodiment 4 | 7.9×10 3 |
| Embodiment 5 | 6.3×10 4 |
| Embodiment 6 | 5.2×10 3 |
| Embodiment 7 | 3.7×10 4 |
| Embodiment 8 | 1.6×10 4 |
| Embodiment 9 | 5.8×10 4 |
| Embodiment 10 | 3.2×10 4 |
| Comparative example 1 | 7.6×10 7 |
| Comparative example 2 | 8.2×10 7 |
| Comparative example 3 | 5.9×10 8 |
| Comparative example 4 | 7.3×10 8 |
| Comparative example 5 | 3.9×10 8 |
As can be seen from the result of table 4, the biological clay control agent of embodiment 1-10 is utilized obviously to be better than utilizing the sterilization effect of the adhesive mud remover of comparative example 1-5 to the sterilization effect of heterotrophic bacterium in foundry loam.Illustrate that biological clay control agent of the present invention can penetrate the binding arrival antimicrobial surface of biological clay appearance, give full play to drug effect, killing microorganisms.
Application examples 3 test in place
The sludge stripping effect in recirculating cooling water system should be applied to by use-case for illustration of biological slime of circulating cooling water control agent of the present invention.
Render in the recirculating cooling water system of the same terms by the biological clay control agent of embodiment 1-10 and the adhesive mud remover of comparative example 1-5 respectively, the consumption of described biological clay control agent and adhesive mud remover is as shown in table 2 respectively.
Field application test condition: the internal circulating load of circulating water system is 13000m
3/ h, power system capacity is 6500m
3/ h, controling parameters is as follows:
Cycles of concentration (saltiness of recirculated cooling water and the ratio of make up water saltiness are described): 3.0 ± 0.2;
The system flow rate of recirculated water: 1.0m/s;
Recirculated water is in the temperature at heat exchanger entrance place: 32 ± 1 DEG C;
Recirculated water imports and exports the temperature difference: 6 DEG C;
Test moisturizing water quality leading indicator is in table 5.
Table 5
The scale inhibitor medicament added in recirculated cooling water is the conventional scale inhibitor medicament used: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)+phosphono-containing butane-1,2,4-tricarboxylic acid (PBTCA)+Zinc vitriol+vinylformic acid/2-methyl-2 '-acrylamido propane sulfonic acid multipolymer (AA/AMPS=7: 3, Limiting Viscosity when 30 DEG C is 0.071dl/g), add concentration and be respectively 4mg/L, 4mg/L, 2mg/L, 9mg/L.
The biological clay control agent of embodiment 1-10 and the adhesive mud remover of comparative example 1-5 is added respectively in the recirculated water of above-mentioned condition, and the slime content measured in recirculated water, dispensing and sampling are all carry out in water collecting basin, biofiltration net method is adopted to measure, concrete operation method is under experimental conditions, by 1m
3online foundry loam, by No. 25 plankton nets, is washed graduated cylinder, records foundry loam volume after sedimentation, it can thus be appreciated that foundry loam amount in recirculated cooling water by recirculated cooling water.The mensuration of slime content is according to industrial circulating cooling water water quality analysis method standard GB/T/T 14643.1-1993.Field application test the results are shown in Table 6.
Table 6
As can be seen from the result of table 6, the biological slime of circulating cooling water control agent of the present invention (embodiment 1-10) is when being applied in circulating cooling system, compared with the adhesive mud remover of prior art (comparative example 1-5), the slime content stripped down is many, thus has more significant sludge stripping effect.
Biological clay control agent of the present invention strengthens the sludge stripping effect of bio-surfactant by the potent osmosis of permeate agent, zoogloea is broken up, recycling non-oxidative bactericide is killed free bacterium, and bio-surfactant also plays certain bacteriostatic action simultaneously.By the combined action of three, greatly eliminate bacterium and again form zoogloea, and then form the possibility of foundry loam, thus sterilization is more thorough, sludge stripping is also more thorough, make to be discharged by blowdown to become possibility, thus reduce the deposition of foundry loam on the e-quipment and pipe inwall of recirculating cooling water system.Biological slime of circulating cooling water control agent of the present invention can reach good biological clay control effects under less medicament usage quantity, use biodegradable, environmentally friendly bio-surfactant to substitute synthetic surfactant and carry out sludge stripping, thus minimizing recirculated water adds the draining environmental pollution that chemosynthesis medicament brings.
Claims (5)
1. a biological slime of circulating cooling water control agent, is characterized in that, described biological slime of circulating cooling water control agent contains sterilant, bio-surfactant and permeate agent; Wherein, with the gross weight of described biological slime of circulating cooling water control agent for benchmark, the content of described sterilant is 30-50 % by weight; The content of described bio-surfactant is 30-50 % by weight; The content of described permeate agent is 10-30 % by weight; Described bio-surfactant is glycolipid bio-surfactant; Described sterilant is non-oxidative bactericide; Described non-oxidative bactericide be selected from DBNPA, glutaraldehyde, dithiocyano-methane, Dichlorophenol, trichlorophenol and sodium pentachlorophenate one or more; Described permeate agent be selected from sodium diethylhexyl sulfosuccinate, fatty alcohol-polyoxyethylene ether, water-solubleazone, sulfated castor oil, sodium alkyl sulfate, sodium alkyl benzene sulfonate and alkyl sulfuric ester sodium one or more.
2. biological slime of circulating cooling water control agent according to claim 1, wherein, described glycolipid bio-surfactant be selected from rhamnolipid, marine alga glycolipid, sophorolipid, mannosylerythritol lipid and cellobiose fat one or more.
3. utilize the method for foundry loam in the biological slime of circulating cooling water control agent controlled circulation cooling water system described in any one in claim 1-2, the method comprises to be put into described biological slime of circulating cooling water control agent in recirculated cooling water.
4. method according to claim 3, wherein, the consumption of described biological slime of circulating cooling water control agent makes, and with the recirculated cooling water of often liter for benchmark, the content of described biological slime of circulating cooling water control agent is 10-20mg.
5. method according to claim 3, wherein, the pH value of described recirculated cooling water is 7-9.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103535369B (en) * | 2013-10-25 | 2014-09-17 | 中国海洋石油总公司 | Biological slime inhibitor and preparation method thereof |
| CN103734159A (en) * | 2013-11-26 | 2014-04-23 | 乌鲁木齐市科发展精细化工有限公司 | Efficient non-oxidizing bactericide and preparation method thereof |
| CN105441204B (en) * | 2014-08-12 | 2018-03-02 | 中国石油化工股份有限公司 | One kind peels off cleansing composition and its application method |
| CN105331455B (en) * | 2014-08-12 | 2018-06-15 | 中国石油化工股份有限公司 | A kind of stripping cleansing composition and its application method |
| CN106544159B (en) * | 2016-11-09 | 2019-02-26 | 山东英联化学科技有限公司 | Adhesive mud remover and preparation method thereof applied to circulation |
| CN111493090A (en) * | 2020-05-22 | 2020-08-07 | 德蓝水技术股份有限公司 | Solid chlorine bactericide and preparation method thereof |
| CN111777201A (en) * | 2020-08-04 | 2020-10-16 | 东莞市庆源水处理科技有限公司 | Circulating cooling water treatment agent and treatment method thereof |
| CN112591906B (en) * | 2021-01-21 | 2022-10-28 | 欣格瑞（山东）环境科技有限公司 | Multifunctional slime stripping agent for zero-pollution discharge and preparation method thereof |
| CN114804375B (en) * | 2021-01-29 | 2023-03-24 | 中国石油化工股份有限公司 | Biological slime dispersion inhibitor and preparation method and application thereof |
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| CN1789159A (en) * | 2005-12-05 | 2006-06-21 | 赵清顺 | Sterilization inhibitor for circulated cooling water treatment |
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| JP2002193712A (en) * | 2000-12-22 | 2002-07-10 | Mitsubishi Gas Chem Co Inc | Slime control agent |
| CN1789159A (en) * | 2005-12-05 | 2006-06-21 | 赵清顺 | Sterilization inhibitor for circulated cooling water treatment |
| CN101637155A (en) * | 2009-08-26 | 2010-02-03 | 北京拓凯化工技术有限公司 | Bactericidal and algaecidal composition for intermediate water system, preparation method and application thereof |
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